Tracing chart



Aug. 1, 1933. c. LORBER 1,920,704

TRACING cum:

Filed Oct. 17, 1932 2 Sheets -Sheet 1 [1111612 for [Zar/ax Zorfier Aug. 1, 1933. Q LORBER 1,920,704

' TRACING CHART Filed Oct. 17', 19:52 2 Sheets-Sheet 2 hwy/0r Ck aria; Zorfier y, M/6

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Patented Aug. 1, 1933 a 7 r i UNITED STATES PATENT ,OF FICE 1,920,704

'maome CHART v Charles Lorber, Louisville, Ky.- Application October 17, 1932. ,.SerialNo. 638,245

" 4 Claims. (01. 35-8) This invention relates to educational devices sists in general of certain novel details of con-' and has special reference to tracing chart pads. struction and combinations of parts hereinafter More particularly the invention relates to imfully: described, illustrated in the accompanying. provements in the educational device illustrated drawings and specifically claimed.

d described in my copending application for In the accompanying drawings like characters patent on tracing chart,"filed December 22, 1931, of reference indicate like parts in the several Serial number 582,625, and which was issued on views, and: I h Nov. 8, 1932, as Patent Number 1,887,160. Figure l is a perspective view, partly broken In the forms of the invention shown anddeaway, showing one form of the invention in which scribed in the aforementioned copending appli: the sheets are held in a binder. H

cation it will be noted that each sheet of the Figure 2 is a similar view of a second bound tracing paper used is arranged to form'an indiform of the invention. vidual envelope. For certain educational pur- Figure 3 is a perspective view, partlybroken poses it is desirable to provide the student, at one away and showing one form of unbound pad as time, with a number of sheets of the tracing used in connection with the invention. 70 paper and it is preferable, under such conditions, Figure 4 is a view similar to Figure 1 showing 1 to bind the various sheets together in some mana second modification of the bound form of the ner to prevent loss and wrinkling through caretracing sheets pad. less handling. Envelopes of the type shown in Figure 5 is a perspective view of part of a pad said application do not readily lend themselves of tracing sheets with the sheets secured together to being bound and require considerable more by staples. V paper than if single sheets are used. Figure 6 is a section on the line, 6-6 of Fig- I have discovered that it is possible to so asure 5. Q semble a multiplicity of single sheets in pad form, Figure 7 is a view similar to Figure 6 but showbound or unbound, in such manner as to make ing the sheets held together by screws and nuts. 80

each individual sheet a copy sheet and to make Figure 8 is a section on the line 88 of Figthe space between successive sheets fully equivure 7. alent to an envelope so that, for the purposes of Figure 9 is a face view of a tracing chart suitthis invention each two successive sheets will be able for use herewith.

' termed the front and back of an envelope thereby ..In each embodiment of the invention as herein eliminating loss and injury 'to the sheets and efdisclosed there is provided a pack or pad 10 confecting great economy in the use of the tracing sisting of a multiplicity of superposed tracing paper as well as enabling a permanent record of sheets. These tracing sheets are preferably of the students work to be kept. thin transparent paper and are of such character One important object of the invention is, therethat an object placed beneath a sheet is plainly fore, to provide a novel arrangement of transvisible. Moreover, the tracing sheets'are also parent tracing sheets in pad form associated with of such character as to readily receive marks a tracing chart proper bearing characters to be made by a writing or drawing implement such traced, the padding of the tracing sheets being as a pen. Accordingly, whenever, in the specifisuch as to permit the chart to be inserted becation and claims, tracing sheets are mentioned a tween two of the tracing sheets and to permit it is to be understood that these are transparent tracing to be performed on the upper of the two sheets readily receiving marks made by a writing sheets. or drawing implement. Associated with these A second important object of the invention is sheets is a tracing chart 11 preferably of cardto provide a pad of this character wherein asboard and having characters 12 impressed theresembled tracing sheets are so arranged that they on so as to be plainly visible through a tracing form in effect the front of one envelope and the sheet. As here shown the characters 12 are those back of the next preceding envelope. of the written alphabet but it is to be distinctly A third important object of the invention is understood that the invention is not restricted 5 115.0 to so pad and bind such tracing sheets that, after to the specific characters here shown but the 5,

use, they may be retained in the binding used. tracing chart may be arranged with any desired while freed from other connection with the recharacters or illustrations to be traced such as 1 maining and unused sheets. geometrical forms, representations of natural ob- With the above and other objects in view as jects and the like. Moreover; in commercial diswill be hereinafter apparent, the invention contribution it is proposed to" associate with eachpad of tracing sheets a number of tracing charts each being different from the others so that such charts may be arranged to form successive steps necessary to illustrate such charts as the invention doesnot reside in the character of the matter to be traced or in the number of charts, to be used.

In the form of the invention shown in Figure. 1 the pad 10 is bound in a binder 13, here shown as or the so-called loose-leaf type, the sheets being held in the binder bythe fasteners 14. In this form the chart 11 is first inserted beneath the uppermost sheet and is traced on that sheet;

After the sheet is used it mas be torn out at the bound edge or may be folded back against the front cover of the binder if a permanent record is desired. The chart is then placed beneath the next sheet and this process is continued until all the sheets are used.

In the form shown in Figure 2 the pad 10 has the lower edges of the sheets coated as at 15with a suitable adhesive such as is commonly used for padding piles of sheets. A binder 16' is used to hold this pad, the pad beingheld by oneend as shown. Inthis form there is thus provided a multiplicity of envelopes, the upper sheet forming the front and the next sheet the back for each envelope and these envelopes are open at the top and right edge for the insertion of manner similar to that previously described but as in the preceding forms.

it will be obvious that, as each sheet is used it is separated at the bottom from the remainder of the pad in any of the usual ways, for instance by running a pencil along the bottom edge be-- tween the top sheet and that'next below.

In the form shown in Figure 3, the binder is eliminated but, in addition to the adhesive 15, an end of the pad is provided with adhesive 17 to bind the sheets together at the ends just as the binder 1 6 acts in the form shown in Figure 2. Obviously, the pad is used as in the last form.

In the form shown in Figure 4 the binder 18' is applied to one edge of the pad 10 and the opposite edge is provided with adhesive 19 so that the envelopes formed are open at two opposite edges and the chart 11 is inserted by slipping in from one of the open edges. The use is the same In Figures 5 and 6 the use of adhesive is eliminated and the. sheets of the pad 10 are heldtogether by staples 20 while in Figures 7 and 8 the staples are replaced by screw and nut fastenings 21 such as are used in connection with the bind- 1 ing of loose leaves.

Obviously'other means, not deemed necessary to be here shown, may be used to hold the tracing sheets in pad form. For instance, ribbons or laces may be used to hold the sheets together.

There has thus been provided a simple and efiicient device of the kind describedand for the purpose specified.

It is obvious that minor changes may be made in the form and construction of the invention without departing from thematerial spirit thereof. It is not, therefore, desired to confine the invention to the exact form herein shown and described, but it is desired to include all such as properly come Within the scope claimed.

Having thus described the invention, What is claimed as new, is: V v

.1. The combination for use with a' grooved tracing chartjof a pad consisting of a multiplicity of sheets of transparent tracing paper permanently bound together at one edge and adhesively detachably connected together along a second edgeto form a multiplicity of superposed casings.

I 2. The combination for use with a grooved tracing chart; of a pad consisting of a multipiicity of sheets of transparent tracing paper permanently bound together at one edge and adhesively deadhesively secured edge being adjacent the-- permanently bound edge whereby a chart placed in a pocket may be held in definite position in two directions by engagement with the boundiand secured edges;

r 3. The combination for use with a grooved tracing chart; of a" pad consisting of 'a multiplicity of sheets of transparent tracing paper permanently bound together at one edge and detachably connectedtogether along a second edge to 'form a multiplicity of superposed casings.

l. The combination for use with a grooved tracing chart; of a pad consisting of a multiplicity of sheets of transparent tracing paper permanently bound together atone edge and detachably connected together along a second edge to form a multiplicity of superposed pockets, the detachably secured edge being adjacent the permanentlybound edge whereby a chart placed in a pocket may beheld in definite position in'two directions by engagement with the bound and secured edges.

' 7 CHARLES LORBER. 

